[MS] Add more 128bit cmpxchg intrinsics for AArch64
The MSVC STL for requires this on ARM64. Requested in https://llvm.org/pr47099 Depends on D92061 Differential Revision: https://reviews.llvm.org/D92062
This commit is contained in:
Reid Kleckner
parent
3bd0672726
commit
1e843a987d
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@ -153,6 +153,11 @@ TARGET_HEADER_BUILTIN(_InterlockedCompareExchange64_acq, "LLiLLiD*LLiLLi", "nh",
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TARGET_HEADER_BUILTIN(_InterlockedCompareExchange64_nf, "LLiLLiD*LLiLLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
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TARGET_HEADER_BUILTIN(_InterlockedCompareExchange64_rel, "LLiLLiD*LLiLLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
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TARGET_HEADER_BUILTIN(_InterlockedCompareExchange128, "UcLLiD*LLiLLiLLi*", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
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TARGET_HEADER_BUILTIN(_InterlockedCompareExchange128_acq,"UcLLiD*LLiLLiLLi*", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
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TARGET_HEADER_BUILTIN(_InterlockedCompareExchange128_nf ,"UcLLiD*LLiLLiLLi*", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
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TARGET_HEADER_BUILTIN(_InterlockedCompareExchange128_rel,"UcLLiD*LLiLLiLLi*", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
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TARGET_HEADER_BUILTIN(_InterlockedOr8_acq, "ccD*c", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
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TARGET_HEADER_BUILTIN(_InterlockedOr8_nf, "ccD*c", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
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TARGET_HEADER_BUILTIN(_InterlockedOr8_rel, "ccD*c", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
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@ -304,6 +304,10 @@ Value *EmitAtomicCmpXchgForMSIntrin(CodeGenFunction &CGF, const CallExpr *E,
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AtomicOrdering::Monotonic :
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SuccessOrdering;
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// The atomic instruction is marked volatile for consistency with MSVC. This
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// blocks the few atomics optimizations that LLVM has. If we want to optimize
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// _Interlocked* operations in the future, we will have to remove the volatile
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// marker.
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auto *Result = CGF.Builder.CreateAtomicCmpXchg(
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Destination, Comparand, Exchange,
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SuccessOrdering, FailureOrdering);
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@ -311,6 +315,68 @@ Value *EmitAtomicCmpXchgForMSIntrin(CodeGenFunction &CGF, const CallExpr *E,
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return CGF.Builder.CreateExtractValue(Result, 0);
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}
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// 64-bit Microsoft platforms support 128 bit cmpxchg operations. They are
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// prototyped like this:
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//
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// unsigned char _InterlockedCompareExchange128...(
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// __int64 volatile * _Destination,
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// __int64 _ExchangeHigh,
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// __int64 _ExchangeLow,
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// __int64 * _ComparandResult);
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static Value *EmitAtomicCmpXchg128ForMSIntrin(CodeGenFunction &CGF,
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const CallExpr *E,
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AtomicOrdering SuccessOrdering) {
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assert(E->getNumArgs() == 4);
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llvm::Value *Destination = CGF.EmitScalarExpr(E->getArg(0));
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llvm::Value *ExchangeHigh = CGF.EmitScalarExpr(E->getArg(1));
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llvm::Value *ExchangeLow = CGF.EmitScalarExpr(E->getArg(2));
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llvm::Value *ComparandPtr = CGF.EmitScalarExpr(E->getArg(3));
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assert(Destination->getType()->isPointerTy());
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assert(!ExchangeHigh->getType()->isPointerTy());
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assert(!ExchangeLow->getType()->isPointerTy());
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assert(ComparandPtr->getType()->isPointerTy());
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// For Release ordering, the failure ordering should be Monotonic.
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auto FailureOrdering = SuccessOrdering == AtomicOrdering::Release
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? AtomicOrdering::Monotonic
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: SuccessOrdering;
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// Convert to i128 pointers and values.
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llvm::Type *Int128Ty = llvm::IntegerType::get(CGF.getLLVMContext(), 128);
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llvm::Type *Int128PtrTy = Int128Ty->getPointerTo();
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Destination = CGF.Builder.CreateBitCast(Destination, Int128PtrTy);
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Address ComparandResult(CGF.Builder.CreateBitCast(ComparandPtr, Int128PtrTy),
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CGF.getContext().toCharUnitsFromBits(128));
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// (((i128)hi) << 64) | ((i128)lo)
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ExchangeHigh = CGF.Builder.CreateZExt(ExchangeHigh, Int128Ty);
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ExchangeLow = CGF.Builder.CreateZExt(ExchangeLow, Int128Ty);
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ExchangeHigh =
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CGF.Builder.CreateShl(ExchangeHigh, llvm::ConstantInt::get(Int128Ty, 64));
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llvm::Value *Exchange = CGF.Builder.CreateOr(ExchangeHigh, ExchangeLow);
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// Load the comparand for the instruction.
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llvm::Value *Comparand = CGF.Builder.CreateLoad(ComparandResult);
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auto *CXI = CGF.Builder.CreateAtomicCmpXchg(Destination, Comparand, Exchange,
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SuccessOrdering, FailureOrdering);
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// The atomic instruction is marked volatile for consistency with MSVC. This
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// blocks the few atomics optimizations that LLVM has. If we want to optimize
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// _Interlocked* operations in the future, we will have to remove the volatile
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// marker.
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CXI->setVolatile(true);
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// Store the result as an outparameter.
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CGF.Builder.CreateStore(CGF.Builder.CreateExtractValue(CXI, 0),
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ComparandResult);
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// Get the success boolean and zero extend it to i8.
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Value *Success = CGF.Builder.CreateExtractValue(CXI, 1);
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return CGF.Builder.CreateZExt(Success, CGF.Int8Ty);
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}
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static Value *EmitAtomicIncrementValue(CodeGenFunction &CGF, const CallExpr *E,
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AtomicOrdering Ordering = AtomicOrdering::SequentiallyConsistent) {
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assert(E->getArg(0)->getType()->isPointerType());
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@ -993,6 +1059,10 @@ enum class CodeGenFunction::MSVCIntrin {
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_InterlockedCompareExchange_acq,
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_InterlockedCompareExchange_rel,
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_InterlockedCompareExchange_nf,
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_InterlockedCompareExchange128,
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_InterlockedCompareExchange128_acq,
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_InterlockedCompareExchange128_rel,
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_InterlockedCompareExchange128_nf,
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_InterlockedOr_acq,
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_InterlockedOr_rel,
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_InterlockedOr_nf,
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@ -1230,6 +1300,14 @@ translateAarch64ToMsvcIntrin(unsigned BuiltinID) {
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case AArch64::BI_InterlockedCompareExchange_nf:
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case AArch64::BI_InterlockedCompareExchange64_nf:
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return MSVCIntrin::_InterlockedCompareExchange_nf;
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case AArch64::BI_InterlockedCompareExchange128:
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return MSVCIntrin::_InterlockedCompareExchange128;
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case AArch64::BI_InterlockedCompareExchange128_acq:
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return MSVCIntrin::_InterlockedCompareExchange128_acq;
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case AArch64::BI_InterlockedCompareExchange128_nf:
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return MSVCIntrin::_InterlockedCompareExchange128_nf;
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case AArch64::BI_InterlockedCompareExchange128_rel:
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return MSVCIntrin::_InterlockedCompareExchange128_rel;
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case AArch64::BI_InterlockedOr8_acq:
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case AArch64::BI_InterlockedOr16_acq:
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case AArch64::BI_InterlockedOr_acq:
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@ -1317,6 +1395,8 @@ translateX86ToMsvcIntrin(unsigned BuiltinID) {
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return MSVCIntrin::_BitScanReverse;
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case clang::X86::BI_InterlockedAnd64:
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return MSVCIntrin::_InterlockedAnd;
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case clang::X86::BI_InterlockedCompareExchange128:
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return MSVCIntrin::_InterlockedCompareExchange128;
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case clang::X86::BI_InterlockedExchange64:
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return MSVCIntrin::_InterlockedExchange;
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case clang::X86::BI_InterlockedExchangeAdd64:
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@ -1423,6 +1503,15 @@ Value *CodeGenFunction::EmitMSVCBuiltinExpr(MSVCIntrin BuiltinID,
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return EmitAtomicCmpXchgForMSIntrin(*this, E, AtomicOrdering::Release);
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case MSVCIntrin::_InterlockedCompareExchange_nf:
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return EmitAtomicCmpXchgForMSIntrin(*this, E, AtomicOrdering::Monotonic);
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case MSVCIntrin::_InterlockedCompareExchange128:
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return EmitAtomicCmpXchg128ForMSIntrin(
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*this, E, AtomicOrdering::SequentiallyConsistent);
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case MSVCIntrin::_InterlockedCompareExchange128_acq:
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return EmitAtomicCmpXchg128ForMSIntrin(*this, E, AtomicOrdering::Acquire);
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case MSVCIntrin::_InterlockedCompareExchange128_rel:
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return EmitAtomicCmpXchg128ForMSIntrin(*this, E, AtomicOrdering::Release);
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case MSVCIntrin::_InterlockedCompareExchange128_nf:
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return EmitAtomicCmpXchg128ForMSIntrin(*this, E, AtomicOrdering::Monotonic);
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case MSVCIntrin::_InterlockedOr_acq:
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return MakeBinaryAtomicValue(*this, AtomicRMWInst::Or, E,
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AtomicOrdering::Acquire);
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@ -14032,42 +14121,6 @@ Value *CodeGenFunction::EmitX86BuiltinExpr(unsigned BuiltinID,
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return Builder.CreateFence(llvm::AtomicOrdering::SequentiallyConsistent,
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llvm::SyncScope::SingleThread);
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}
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case X86::BI_InterlockedCompareExchange128: {
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// InterlockedCompareExchange128 doesn't directly refer to 128bit ints,
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// instead it takes pointers to 64bit ints for Destination and
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// ComparandResult, and exchange is taken as two 64bit ints (high & low).
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// The previous value is written to ComparandResult, and success is
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// returned.
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llvm::Type *Int128Ty = Builder.getInt128Ty();
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llvm::Type *Int128PtrTy = Int128Ty->getPointerTo();
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Value *Destination =
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Builder.CreateBitCast(Ops[0], Int128PtrTy);
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Value *ExchangeHigh128 = Builder.CreateZExt(Ops[1], Int128Ty);
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Value *ExchangeLow128 = Builder.CreateZExt(Ops[2], Int128Ty);
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Address ComparandResult(Builder.CreateBitCast(Ops[3], Int128PtrTy),
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getContext().toCharUnitsFromBits(128));
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Value *Exchange = Builder.CreateOr(
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Builder.CreateShl(ExchangeHigh128, 64, "", false, false),
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ExchangeLow128);
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Value *Comparand = Builder.CreateLoad(ComparandResult);
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AtomicCmpXchgInst *CXI =
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Builder.CreateAtomicCmpXchg(Destination, Comparand, Exchange,
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AtomicOrdering::SequentiallyConsistent,
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AtomicOrdering::SequentiallyConsistent);
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CXI->setVolatile(true);
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// Write the result back to the inout pointer.
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Builder.CreateStore(Builder.CreateExtractValue(CXI, 0), ComparandResult);
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// Get the success boolean and zero extend it to i8.
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Value *Success = Builder.CreateExtractValue(CXI, 1);
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return Builder.CreateZExt(Success, ConvertType(E->getType()));
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}
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case X86::BI_AddressOfReturnAddress: {
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Function *F =
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@ -214,10 +214,6 @@ unsigned char _interlockedbittestandreset64(__int64 volatile *, __int64);
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unsigned char _interlockedbittestandset64(__int64 volatile *, __int64);
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long _InterlockedCompareExchange_np(long volatile *_Destination, long _Exchange,
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long _Comparand);
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unsigned char _InterlockedCompareExchange128(__int64 volatile *_Destination,
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__int64 _ExchangeHigh,
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__int64 _ExchangeLow,
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__int64 *_CompareandResult);
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unsigned char _InterlockedCompareExchange128_np(__int64 volatile *_Destination,
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__int64 _ExchangeHigh,
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__int64 _ExchangeLow,
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@ -427,6 +423,26 @@ __int64 _InterlockedCompareExchange64_nf(__int64 volatile *_Destination,
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__int64 _InterlockedCompareExchange64_rel(__int64 volatile *_Destination,
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__int64 _Exchange, __int64 _Comparand);
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#endif
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#if defined(__x86_64__) || defined(__aarch64__)
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unsigned char _InterlockedCompareExchange128(__int64 volatile *_Destination,
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__int64 _ExchangeHigh,
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__int64 _ExchangeLow,
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__int64 *_ComparandResult);
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#endif
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#if defined(__aarch64__)
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unsigned char _InterlockedCompareExchange128_acq(__int64 volatile *_Destination,
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__int64 _ExchangeHigh,
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__int64 _ExchangeLow,
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__int64 *_ComparandResult);
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unsigned char _InterlockedCompareExchange128_nf(__int64 volatile *_Destination,
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__int64 _ExchangeHigh,
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__int64 _ExchangeLow,
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__int64 *_ComparandResult);
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unsigned char _InterlockedCompareExchange128_rel(__int64 volatile *_Destination,
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__int64 _ExchangeHigh,
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__int64 _ExchangeLow,
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__int64 *_ComparandResult);
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#endif
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/*----------------------------------------------------------------------------*\
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|* movs, stos
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@ -6,10 +6,10 @@
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// RUN: | FileCheck %s --check-prefixes CHECK,CHECK-ARM,CHECK-ARM-ARM64,CHECK-ARM-X64
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// RUN: %clang_cc1 -ffreestanding -fms-extensions -fms-compatibility -fms-compatibility-version=17.00 \
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// RUN: -triple x86_64--windows -Oz -emit-llvm -target-feature +cx16 %s -o - \
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// RUN: | FileCheck %s --check-prefixes CHECK,CHECK-X64,CHECK-ARM-X64,CHECK-INTEL
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// RUN: | FileCheck %s --check-prefixes CHECK,CHECK-X64,CHECK-ARM-X64,CHECK-INTEL,CHECK-64
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// RUN: %clang_cc1 -ffreestanding -fms-extensions -fms-compatibility -fms-compatibility-version=17.00 \
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// RUN: -triple aarch64-windows -Oz -emit-llvm %s -o - \
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// RUN: | FileCheck %s --check-prefixes CHECK-ARM-ARM64,CHECK-ARM-X64,CHECK-ARM64
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// RUN: | FileCheck %s --check-prefixes CHECK-ARM-ARM64,CHECK-ARM-X64,CHECK-ARM64,CHECK-64
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// intrin.h needs size_t, but -ffreestanding prevents us from getting it from
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// stddef.h. Work around it with this typedef.
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@ -432,32 +432,59 @@ __int64 test_InterlockedCompareExchange64(__int64 volatile *Destination, __int64
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// CHECK: ret i64 [[RESULT]]
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// CHECK: }
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#if defined(__x86_64__)
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#if defined(__x86_64__) || defined(__aarch64__)
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unsigned char test_InterlockedCompareExchange128(
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__int64 volatile *Destination, __int64 ExchangeHigh,
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__int64 ExchangeLow, __int64 *ComparandResult) {
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return _InterlockedCompareExchange128(++Destination, ++ExchangeHigh,
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++ExchangeLow, ++ComparandResult);
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}
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// CHECK-X64: define{{.*}}i8 @test_InterlockedCompareExchange128(i64*{{[a-z_ ]*}}%Destination, i64{{[a-z_ ]*}}%ExchangeHigh, i64{{[a-z_ ]*}}%ExchangeLow, i64*{{[a-z_ ]*}}%ComparandResult){{.*}}{
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// CHECK-X64: %incdec.ptr = getelementptr inbounds i64, i64* %Destination, i64 1
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// CHECK-X64: %inc = add nsw i64 %ExchangeHigh, 1
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// CHECK-X64: %inc1 = add nsw i64 %ExchangeLow, 1
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// CHECK-X64: %incdec.ptr2 = getelementptr inbounds i64, i64* %ComparandResult, i64 1
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// CHECK-X64: [[DST:%[0-9]+]] = bitcast i64* %incdec.ptr to i128*
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// CHECK-X64: [[EH:%[0-9]+]] = zext i64 %inc to i128
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// CHECK-X64: [[EL:%[0-9]+]] = zext i64 %inc1 to i128
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// CHECK-X64: [[CNR:%[0-9]+]] = bitcast i64* %incdec.ptr2 to i128*
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// CHECK-X64: [[EHS:%[0-9]+]] = shl nuw i128 [[EH]], 64
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// CHECK-X64: [[EXP:%[0-9]+]] = or i128 [[EHS]], [[EL]]
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// CHECK-X64: [[ORG:%[0-9]+]] = load i128, i128* [[CNR]], align 16
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// CHECK-X64: [[RES:%[0-9]+]] = cmpxchg volatile i128* [[DST]], i128 [[ORG]], i128 [[EXP]] seq_cst seq_cst
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// CHECK-X64: [[OLD:%[0-9]+]] = extractvalue { i128, i1 } [[RES]], 0
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// CHECK-X64: store i128 [[OLD]], i128* [[CNR]], align 16
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// CHECK-X64: [[SUC1:%[0-9]+]] = extractvalue { i128, i1 } [[RES]], 1
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// CHECK-X64: [[SUC8:%[0-9]+]] = zext i1 [[SUC1]] to i8
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// CHECK-X64: ret i8 [[SUC8]]
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// CHECK-X64: }
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// CHECK-64: define{{.*}}i8 @test_InterlockedCompareExchange128(i64*{{[a-z_ ]*}}%Destination, i64{{[a-z_ ]*}}%ExchangeHigh, i64{{[a-z_ ]*}}%ExchangeLow, i64*{{[a-z_ ]*}}%ComparandResult){{.*}}{
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// CHECK-64: %incdec.ptr = getelementptr inbounds i64, i64* %Destination, i64 1
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// CHECK-64: %inc = add nsw i64 %ExchangeHigh, 1
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// CHECK-64: %inc1 = add nsw i64 %ExchangeLow, 1
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// CHECK-64: %incdec.ptr2 = getelementptr inbounds i64, i64* %ComparandResult, i64 1
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// CHECK-64: [[DST:%[0-9]+]] = bitcast i64* %incdec.ptr to i128*
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// CHECK-64: [[CNR:%[0-9]+]] = bitcast i64* %incdec.ptr2 to i128*
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// CHECK-64: [[EH:%[0-9]+]] = zext i64 %inc to i128
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// CHECK-64: [[EL:%[0-9]+]] = zext i64 %inc1 to i128
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// CHECK-64: [[EHS:%[0-9]+]] = shl nuw i128 [[EH]], 64
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// CHECK-64: [[EXP:%[0-9]+]] = or i128 [[EHS]], [[EL]]
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// CHECK-64: [[ORG:%[0-9]+]] = load i128, i128* [[CNR]], align 16
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// CHECK-64: [[RES:%[0-9]+]] = cmpxchg volatile i128* [[DST]], i128 [[ORG]], i128 [[EXP]] seq_cst seq_cst
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// CHECK-64: [[OLD:%[0-9]+]] = extractvalue { i128, i1 } [[RES]], 0
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// CHECK-64: store i128 [[OLD]], i128* [[CNR]], align 16
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// CHECK-64: [[SUC1:%[0-9]+]] = extractvalue { i128, i1 } [[RES]], 1
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// CHECK-64: [[SUC8:%[0-9]+]] = zext i1 [[SUC1]] to i8
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// CHECK-64: ret i8 [[SUC8]]
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// CHECK-64: }
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#endif
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#if defined(__aarch64__)
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unsigned char test_InterlockedCompareExchange128_acq(
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__int64 volatile *Destination, __int64 ExchangeHigh,
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__int64 ExchangeLow, __int64 *ComparandResult) {
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return _InterlockedCompareExchange128_acq(Destination, ExchangeHigh,
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ExchangeLow, ComparandResult);
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}
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unsigned char test_InterlockedCompareExchange128_nf(
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__int64 volatile *Destination, __int64 ExchangeHigh,
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__int64 ExchangeLow, __int64 *ComparandResult) {
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return _InterlockedCompareExchange128_nf(Destination, ExchangeHigh,
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ExchangeLow, ComparandResult);
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}
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unsigned char test_InterlockedCompareExchange128_rel(
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__int64 volatile *Destination, __int64 ExchangeHigh,
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__int64 ExchangeLow, __int64 *ComparandResult) {
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return _InterlockedCompareExchange128_rel(Destination, ExchangeHigh,
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ExchangeLow, ComparandResult);
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}
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// CHECK-ARM64: define{{.*}}i8 @test_InterlockedCompareExchange128_acq({{.*}})
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// CHECK-ARM64: cmpxchg volatile i128* %{{.*}}, i128 %{{.*}}, i128 %{{.*}} acquire acquire
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// CHECK-ARM64: define{{.*}}i8 @test_InterlockedCompareExchange128_nf({{.*}})
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// CHECK-ARM64: cmpxchg volatile i128* %{{.*}}, i128 %{{.*}}, i128 %{{.*}} monotonic monotonic
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// CHECK-ARM64: define{{.*}}i8 @test_InterlockedCompareExchange128_rel({{.*}})
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// CHECK-ARM64: cmpxchg volatile i128* %{{.*}}, i128 %{{.*}}, i128 %{{.*}} release monotonic
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#endif
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short test_InterlockedIncrement16(short volatile *Addend) {
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